Inter Decadal Variability of Cool Summer of Northeastern Asia

Obvious inter decadal variability of summer temperature over northeastern Asia has been found through the analysis of summer temperature over Northeastern Asia. The time scale is about 80 years and 30 years. There are 27 cool summers in 120 years period, and the 6 of 27 cool summers are serious cool summers. The relationship between the circulation mechanism of cool summer and SST has been studied by analysis on SLP, 500 hPa geopotential height and SST. It is pointed out that the inter decadal variability of the summer temperature over northeastern Asia has close relationship with the large-scale circulation and the SST.